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Gold pour call - Eluant or Carbon Call (1 reply and 1 comment)
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Good day,
We run a Zadra elution circuit and we usually use a carbon call (using loaded and barren carbon values) to determine what gold bar we might pour. However, we also keep track of our eluant call (using pregnant solution and barren solution values). The two are usually within an acceptable limit of one another, however of late our carbon call has been higher than the eluant call and we are pouring close to what the eluant call gives us.
Any ideas where we could start looking for errors? we have ruled out laboratory assay errors as the standards are acceptable. Another thing to note is that our pregnant solution values, while stripping, do not indicate that we have the high loadings that our loaded carbon values suggest.